Capillary electrophoresis (CE) has become a powerful tool for enantiomer separat ions during the last decade. Since 1993, the author has investigated enantiomer separations by affinity capillary electrophoresis (affinity CE) with some prote ins and by cyclodextrin electrokinetic chromatography (CDEKC) with some charged cyclodextrins (CDs). Many successful enantiomer separations are demonstrated f rom our study in this review article. In the enantiomer separations by affinit y CE, the deterioration of detection sensitivity was observed under high concent ration of the protein in running solutions. The partial filling technique was practically useful to solve the serious problem. It allowed operation at high protein concentrations, such as 500 μmol/L, without the detection problem. Cha rged CDs had several advantages for the enantiomer separations over neutral ones . Strong electrostatic interactions between a charged CD and oppositely charged analytes should be effective for the formation of the complex. A large differen ce in electrophoretic mobility between the free analyte and the inclusion comple x should also enhance the enantiomeric resolution. In CEmass spectrometry (CE MS), the partial filling technique was applied to avoid the introduction of no nvolatile chiral selectors into the CEMS interface. By replacing the nonvolat ile electrolytes in the running buffer by volatile ones, the separation conditio ns employed in CE with the UV detection method could be transferred to CEMS.